CN110087987A - Floating offshore structure with round floating drum - Google Patents

Abstract

A kind of floating offshore structure comprising buoyancy hull, the buoyancy hull include the first pillar, the second pillar and the floating drum for being connected to the first pillar and the second pillar.Each pillar is vertically oriented, and the floating drum extends horizontally to the second pillar from the first pillar.Each pillar has central axis, top and bottom.The floating drum includes the first tubular element and the second tubular element, which is oriented laterally adjacent with the first tubular element.Each tubular element have central axis, be connected to the first pillar lower end first end and be connected to the second pillar lower end second end.The longitudinal axis of the longitudinal axis of first tubular element and the second tubular element is arranged in common horizontal plane.

Description

Floating offshore structure with round floating drum

Cross reference to related applications

The application requests entitled " the Floating Offshore Structures submitted on November 9th, 2016 The with Round Pontoons floating offshore structure of floating drum (have round) " application No. is 62/419,828 U.S. to face When patent application priority, the full content of the U.S. Provisional Patent Application is incorporated herein by reference.

About federal government's sponsored research or the statement of exploitation

It is not applicable.

Technical field

The disclosure relates generally to floating offshore structures.More specifically, this disclosure relates to being used for offshore drilling and/or exploitation The buoyancy semi-submersible type offshore platform of operation.Again specifically, this disclosure relates to which the geometry of the hull of semi-submersible type offshore platform, special It is not the horizontal floating drum of hull.

Background technique

In the activity of oil field, semi-submersible type floating structure or platform are used for various types of offshore operations, including marine brill The exploitation of well and oil and natural gas and offshore construction operation.Conventional semi-submersible type offshore platform generally includes to provide enough Buoyancy the rigidity and/or flexibility of sea bed are extended to the hull that is supported on spar deck above the water surface and from the platform Pipeline or standpipe.Hull usually includes horizontal base, which supports multiple vertically-oriented pillars, these pillars are again Spar deck is supported on above the water surface.In general, floating drum size and pillar quantity by the size and weight of workbench with And the hull related payload to be supported determines.

Summary of the invention

There is disclosed herein the embodiments of floating offshore structure.In one embodiment, floating offshore structure includes buoyancy Hull, the buoyancy hull include the first pillar, the second pillar and the floating drum for being connected to the first pillar and the second pillar.Each Column is vertically oriented, and the floating drum extends horizontally to the second pillar from the first pillar.Each pillar have central axis, on End and lower end.The floating drum includes the first tubular element and the second tubular element, which is oriented and the first pipe Shape component is laterally adjacent.Each tubular element has the first end and connection of central axis, the lower end for being connected to the first pillar To the second end of the lower end of the second pillar.The longitudinal axis of the longitudinal axis of first tubular element and the second tubular element is arranged in In common horizontal plane.

In another embodiment, floating offshore structure includes buoyancy hull, which includes the first pillar, second Pillar and the floating drum that the second pillar is extended to from the first pillar.Each pillar be vertically oriented and have central axis, on End and lower end.The floating drum includes the first cylindrical tubular member and the second cylindrical tube for being parallel to first tubular element orientation Shape component.Second cylindrical tubular member is oriented laterally adjacent with the first cylindrical tubular member.Each tubular element quilt Be horizontally oriented, and with central axis, be connected to the first pillar lower end first end and be connected to the second pillar The second end of lower end.

Embodiment described herein include be intended to overcome it is relevant to the devices, systems, and methods of certain prior arts each The combination of the features and characteristics of kind disadvantage.Feature and the technology for quite widely having outlined the disclosed embodiments above are special Property, so as to more fully understand detailed description below.By reading detailed description below and referring to attached drawing, this field skill Art personnel are readily apparent various characteristics and feature and other characteristics and feature described above.It should be appreciated that disclosed Design and specific embodiment, which can easily serve as, to be modified to realize purpose identical with the disclosed embodiments or designs it The basis of his structure.It should be further appreciated that spirit and scope of this kind of equivalent constructions without departing from principle disclosed herein.

Detailed description of the invention

In order to which disclosed exemplary embodiment is described in detail, now with reference to attached drawing, in which:

It (is locally to show that Fig. 1, which is according to the perspective view of the embodiment of the semi-submerged offshore platform of principle described herein, The form of meaning)；

Fig. 2 is the perspective view of one of floating drum of semisubmersible platform of Fig. 1；

Fig. 3 is the enlarged perspective in one of corner of hull of semisubmersible platform of Fig. 1, shows a vertical support Truncation part (truncated portions) and two horizontal floating drums；

Fig. 4 is the oblique bottom view in section of the partial enlargement of one of pillar of semisubmersible platform of Fig. 1；

Fig. 5 is the enlarged perspective of the truncation pillar of Fig. 3, and wherein floating drum is removed；

Fig. 6 be according to described principle, it is saturating for the partial enlargement of the embodiment of the hull of semi-submerged offshore platform View, and show a corner of hull, the corner include a vertical support truncation part and two horizontal floating drums； And

Fig. 7 be according to described principle, it is saturating for the partial enlargement of the embodiment of the hull of semi-submerged offshore platform View, and show a corner of hull, the corner include a vertical support truncation part and two horizontal floating drums.

Annotation and name

It is described below the example of some embodiments of the disclosure.It will be recognized by those of ordinary skill in the art that retouching below It states and has a wide range of applications, and be intended to be the example of the embodiment to the discussion of any embodiment, it is not intended that with any Mode implies that the scope of the present disclosure (including claim) is confined to the embodiment.

These figures are not necessarily drawn to scale.Certain features disclosed herein and component may with the ratio exaggerated or slightly Schematic form is shown, and for clarity and brevity, and some details of customary components may be not shown.Some In figure, in order to improve clear degree and terseness, many aspects of one or more components or component may be omitted, or may not Appended drawing reference with identification characteristics or component.In addition, in specification (including attached drawing), may use similar or identical attached Icon is remembered to identify common element or similar component.

As used in herein (including in the claims), the group of term " comprising " and "comprising" and these terms New word uses in an open-ended fashion, therefore should be interpreted that " including but not limited to ... ".Moreover, term " connection " or " connection It is connected to " it means and directly or indirectly connects.Therefore, if first component connection or being connected to second component, the component it Between connection can by both parts directly engaging or by via other intermediate members, device and/or connection That realizes is indirectly connected with.Statement " being based on " means " being based at least partially on ".Therefore, if X is based on Y, X can be based on Y simultaneously And it is based on any number of other factors.Word "or" is used in a manner of nonexcludability.For example, " A or B " means following It is a kind of: containing only " A ", to contain " A " and " B " containing only " B ", or simultaneously.

In addition, term " axial direction " and " axially " generally mean along given axis, and term " radial direction " and " radially " Generally mean perpendicular to the axis.For example, axial distance refer to along given axis or be parallel to given shaft centerline measurement away from From, and radial distance means the distance perpendicular to the shaft centerline measurement.As understood in the art, the term " parallel " that uses and " vertical " can refer to that accurate or ideal state and component can distinguish substantially parallel or substantially vertical situation.In addition, any Place refer to relative direction or relative position (example include " top ", " bottom ", "upper", " upward ", "lower", " being lower than ", " clockwise ", " left side ", " to the left ", " right side ", " right side ", " downward " and " lower section ") it is provided to for the sake of understanding.For example, object or The relative direction of feature or relative position may be related with as shown in the figure or described orientation.If from another orientation Object or feature implement the object or feature with another orientation, then may be suitble to describe using the term of substitution The direction or position.As used herein, term " approximation ", " about ", " substantially " etc. mean the 10% of described value (that is, in positive 10% or minus 10%).Thus, for example, in the range of the angle of " about 80 degree " refers to from 72 degree to 88 degree Angle.

Specific embodiment

As previously mentioned, the hull of floating semisubmersible platform generally include horizontal base and extend from the pedestal it is multiple vertical Pillar.The pedestal generally includes multiple horizontal floating drums (for example, 3 or more) of end-to-end link, has in big to be formed Entreat the closed loop configuration of opening.The lower end of these pillars is placed on the corner of the pedestal by sitting (that is, in the cross part of every a pair of of floating drum Place) top on, and from the corner of pedestal extend and be pierced by the water surface reach be supported on pillar upper end on spar deck. Floating drum conventionally has rectangular cross-sectional shape and is made of reinforcement plate.Due to the external pressure of water and from spar deck The compressive load of weight combines, and pillar and floating drum usually require the combination of longitudinal reinforcer and lateral reinforcer.In floating drum Manufacturing cost and construction weight can be improved using reinforcement plate and using reinforcer in floating drum and pillar.However, as follows It will be described in more detail, the embodiment of floating offshore structure and hull disclosed herein, which provides, reduces manufacturing cost and ship The potential of body total weight.

During drilling well or extraction operation, it is often desirable that minimize the movement of floating offshore structure to maintain the platform to exist The position in well site, to reduce a possibility that impaired from the standpipe that the structure extends to sea bed.One point of offshore platform movement Amount is heaving (eave), this is the vertical linearity displacement that platform response is generated in wave motion.Floating platform preferably has Heaving characteristic in acceptable limit, to minimize riser fatigue and intensity requirement.The heaving of many conventional hull designs is special Property special challenge is proposed to the riser systems design for being suitable for caused dynamic load and associated fatigue.However, as follows What text will be described in further detail, the embodiment of floating offshore structure and hull disclosed herein, which provides, improves heaving characteristic Potential.

Referring now to fig. 1, the embodiment of the more pillar floating offshore structures of semi-submersible type or offshore platform 50 is shown.In Fig. 1 In, platform 50 is deployed in water body 52 and is anchored at operation scene using anchoring system.In the present embodiment, offshore platform 50 Including the adjustable floating hull 60 of buoyancy and the spar deck or superstructure (topsides) 55 that are mounted on the top of hull 60.On Portion's structure 55 is supported on 52 top of the water surface by hull 60.Hull 60 includes the adjustable horizontal floating drum 62 of multiple buoyancy and multiple buoyancy Adjustable parallel vertical pillar 64, these vertical supports 64 are upwardly extended from floating drum 62.During the deployment and installation of platform 50, The buoyancy of adjustable floating drum 62 and pillar 64, however, floating drum 62 is usually immersed during being operated after mounting using platform 50 Not (for example, any buoyancy is not provided), and pillar 64 continues to provide adjustable buoyancy to platform 50.

Each floating drum 62 horizontally extends between the lower end of the laterally adjacent pillar 64 of every a pair, so that being formed has four The closed loop base 65 in a corner and central opening 66.Since floating drum 62 extends between the cross side of the lower end of pillar 64, so Pedestal 65 can be described as being formed by the lower end and floating drum 62 of pillar 64.Although pedestal 65 is shown as having in the present embodiment There is square geometry (wherein each floating drum 62 has equal length), but in other embodiments, pedestal is (for example, pedestal 65) can have different geometries, such as rectangle, triangle etc..

Pillar 64 extends through out the water surface 52 vertically from pedestal 65.Superstructure 55 is installed to ship on the top of the upper end of pillar 64 Body 60.In general, the equipment used in oil and natural gas probing or extraction operation (such as it is frame tower, winch, pump, washer, heavy Shallow lake device etc.) it is arranged in superstructure 55 and is supported by superstructure 55.In the present embodiment, standpipe or other conduits (do not show The opening 66 passed through in pedestal 65 out) arrives superstructure 55.In such embodiments, standpipe or other conduits are directly supported with respect to the housing At superstructure 55.However, in other embodiments, standpipe or other conduits can be supported directly by floating drum 62.

Referring now to Fig. 2, a floating drum 62 is shown, and will be according to the reason of " other floating drums 62 of hull 60 are also identical " Solution describes the floating drum 62.Floating drum 62 includes the parallel circle cylindricality tubular element of multiple lengthwises be linked together side by side, straight 75.In the present embodiment, floating drum 62 includes two horizontal tubular components 75, the two horizontal tubular components 75 are logical along its length The connecting plate 82 for crossing lengthwise can fixedly be coupled side by side.As used herein, term " lengthwise " refers to structure or component Length (for example, being measured along central axis or longitudinal axis) be greater than width or diameter (for example, perpendicular to central axis or longitudinal direction Shaft centerline measurement).Plate 82 horizontally extends between a pair of of tubular element 75, therefore, the upper and lower surfaces cloth of connecting plate 82 It sets in the horizontal plane with vertical surface normal vector (surface vectors).

Referring now to fig. 1 and Fig. 2, each tubular element 75 include linear (that is, straight) central axis or longitudinal axis Line 76；First end 75A, first end 75A are solidly associable to the cross side of the lower end of a pillar 64；And second end 75B, second end 75B are solidly associable to the cross side of the lower end of another pillar 64.Therefore, each tubular element 75 Extend between two pillars 64.In the present embodiment, each tubular element 75 has between both ends 75A, 75B along axial survey The equal length of amount, therefore, each floating drum 62 axial length having the same.The axis of tubular element 75 in the same floating drum 62 Line 76 is located in common horizontal plane, and further, the axis 76 of the tubular element 75 in all floating drums 62 of pedestal 65 is located at In common horizontal plane.

As being best shown in Fig. 2, each tubular element 75 includes cylindrical side wall 77, internal cavities 78 and multiple Axially spaced annular reinforcer 79, these annular reinforcers 79 are installed to the inner surface of side wall 77 in cavity 78.End cap Or end plate 80 is mounted to every one end 75A, 75B, thus the cavity 78 in closing and sealed tubular component 75.In Fig. 1 and Fig. 2 In, end plate 80 is perpendicular to the flat of the orientation of axis 76.In embodiment, cavity 78 can be divided into multiple and different and divide From ballast tank (ballast tanks).For example, multiple axially spaced vertical bulkheads can be arranged along tubular element 75 (bulkheads), to limit multiple axially adjacent ballast tanks.Such ballast tank can selective filling have fixed ballast Object, adjustable ballast, gas (such as air) or their combination, to adjust the buoyancy of corresponding tubular element 75, and Therefore the buoyancy of corresponding floating drum 62 and pedestal 65 is adjusted.

As shown in figure 3, tubular element 75 can be formed by end-to-end combined multiple circular section 77A.At this In embodiment, section 77A is not lengthwise, however, in other embodiments, forming the section of tubular element (for example, tubulose structure Each section 77A of part 75) it is lengthwise.As an alternative, tubular element 75 can form (single piece by the rectangle material piece of lengthwise Or multiple weld together to form single piece), which is rolled-up, then by along seam longitudinal measure.

Referring now to Fig. 2 and Fig. 3, each cross side of each floating drum 62 is provided with horizontal sides listrium 84.Each plate 84 horizontally extend and axially extending along the length of corresponding floating drum 62 from the cross side of corresponding floating drum 62.More specifically, one Margin plate 84 is on the cross side opposite with connecting plate 82 of each tubular element 75 from the outer surface water of each tubular element 75 Level land extends.In the present embodiment, connecting plate 82 and margin plate 84 are arranged in common horizontal plane, and are further arranged in The vertically intermediate portion of cylindrical tubular member 75 exists respectively.

As shown in figure 3, multiple axially spaced vertically-oriented gussets or bracket 86 from the upper surface of each plate 84 and Lower surface extends to the outer surface of the side wall 77 of respective tubular component 75.Each bracket 86 is axial right with an annular reinforcer 79 Together.86 slab with stiffened edges 84 of bracket simultaneously provide rigidity for margin plate 84.Connecting plate 82 and margin plate 84 are that floating drum 62 provides structure Integrality, and damping is provided to the vertical motion of platform 50, because they are located in horizontal plane and cause to resist vertically movable Resistance and additional mass.Therefore, each of plate 82,84 can also be described as reducing the vertical motion of platform 50 " heave plate ".

The vertical height of corresponding floating drum 62 can be reduced or minimized in being arranged side by side for multiple cylindrical tubular members 75, simultaneously Increase or maximize its horizontal width.Such geometry provides following potential: reducing floating drum 62 and platform 50 is undergone The transverse load that is generated due to ocean current and wave of possibility, and the vertical resistance by increasing floating drum 62 and additional mass come Reduce 50 heaving of platform.As a result, compared with the conventional floating drum for being designed to manage the heaving of similarly sized conventional hull, herein Described in the embodiment of floating drum (for example, floating drum 62) provide the latent of the performance requirement and relevant cost for reducing anchoring system Energy.

Referring now to fig. 1 and Fig. 3, each pillar 64 of hull 60 have vertically oriented, linear (that is, straight) Central axis or longitudinal axis 101.Therefore, in the front view and side view of hull 60, axis 101 is perpendicular to cylindrical The axis 76 of component 75.In addition, each pillar 64 includes multiple parallel lengthwise cylindrical tubular members 105.Each tubulose structure Part 105 has the first end for supporting superstructure 55 or upper end 105A and the second end or the lower end that are attached to a pair of of floating drum 62 105B.In Fig. 1 and embodiment shown in Fig. 3, each pillar 64 includes four cylindrical tubular members 105, this four cylinders Shape tubular element 105 is circumferentially evenly spaced apart and is arranged side by side around the axis 101 of respective strut 64, to limit substantially just Rectangular pillar 64.In addition, axis 101 of each tubular element 105 from respective strut 64 in given pillar 64 is equidistant 's.

Referring now to Fig. 3 and Fig. 4, each tubular element 105 includes cylindrical side wall 107, internal cavities 108 and multiple Axially spaced annular reinforcer 119, these annular reinforcers 119 are installed to the inner surface of side wall 107 in cavity 108. As being best shown in Fig. 4, in the present embodiment, the internal cavities 108 of each tubular element 105 are divided into multiple vertical The compartment 126 of stacking, these compartments 126 are limited by multiple axially spaced deck boards or bulkhead 120.Each bulkhead 120 includes The flat 122 of horizontal orientation, the flat 122 are reinforced by the two groups of reinforcers 124 vertically oriented.Compartment 126 exists Multiple and different and isolated ballast tanks is limited in each tubular element 105.Such ballast tank can selective filling have fixation Ballast, adjustable ballast, gas (such as air) or their combination, to adjust respective tubular component 105 and base The buoyancy of seat 65.

Referring now still to Fig. 4, the lower end 105B of each tubular element 105 in given pillar 64 is covered by external deck 130 And it seals.In other words, single horizontal deck 130 extends across the lower end 105B of each tubular element 105 of respective strut 64, envelope It closes and seals lower end 105B.Deck 130 also limits bulkhead or the bottom of the ballast tank 126 of the bottom for each component 105 Portion's panel to simplify the design of hull 60, and carrys out closed lower 105B without individual additional materials plate.Each deck 130 Including level board 132, which is reinforced by two groups extended in the vertical direction multiple reinforcer 134A, 134B.In this reality It applies in example, each deck 130 has substantially square shape.In other embodiments, which can have There is different shapes (for example, circle, rectangle etc.).

As being best shown in Fig. 1 and Fig. 3, deck 130 horizontally (radially relative to axis 101) extends beyond phase Answer the periphery of pillar 64 and relevant tubular element 105.Surpass in general, each deck 130 extends (radially relative to axis 101) The horizontal distance of the periphery of respective strut 64 can be customized out, to realize the desired heaving of hull 60 and platform 50. In the embodiment being described herein, each deck 130 extends (radially relative to axis 101) beyond the outer of respective strut 64 The horizontal distance in week is preferably equal to or greater than the minimum horizontal distance between every a pair of of adjacent tubular member 105 of respective strut 64 (for example, about 1m), and it is less than or equal to the outer diameter of a tubular element 105 of respective strut 64, more preferably respective strut About half of the outer diameter of 64 tubular element 105.In the embodiment illustrated, deck 130 is being fixed to respective strut Extend a small distance below both ends 75A, 75B of 64 cylindrical tubular member 75.The horizontal orientation and size on deck 130 (periphery for extending beyond respective strut 64) makes deck 130 can be used as heave plate, which causes additional mass to subtract The heaving of chain-wales 50.

Similar to the cylindrical tubular member 75 of floating drum 62, the cylindrical tubular member 105 of pillar 64 can be by end-to-end Combined multiple circular section 107A are formed.In the present embodiment, section 107A is not lengthwise, however, at other In embodiment, each section 107A is lengthwise.As an alternative, tubular element 105 can be formed (single by the rectangle material piece of lengthwise A piece or multiple weld together to form single piece), which is rolled-up, then by along seam longitudinal measure.

Referring again to Fig. 3, a corner of pedestal 65 is shown.Particularly, the friendship of a pillar 64 and two floating drums 62 It is shown as that there is corresponding deck 130 at fork.Although illustrating only a corner of pedestal 65 in Fig. 3, it is to be understood that, Other corners of pedestal 65 are identical.As shown in figure 3, floating drum 62 is via multiple connection components 145 (in every a pair of of adjacent members 75, a connection component 145 is disposed between 105) pillar 64 can be fixedly coupled to.More specifically, each tubular element 75 one end 75A, 75B is oriented laterally adjacent with the lower end 105B of respective tubular component 105 and passes through a connection component 145 can be fixedly coupled to lower end 105B.

As being best shown in Fig. 5, in the present embodiment, each connection component 145 includes multiple is horizontally spaced Vertically-oriented bracket 150 and multiple horizontal orientations being vertically spaced from bracket 160.Bracket 150 is fixed in parallel with each other To and be located at by axis 101 orient plane in, and bracket 160 orient in parallel with each other and be located at perpendicular to axis 101 determine To plane in.In addition, a part of circumferentially spaced, and bracket 160 of the bracket 150 around the outer surface 110 of respective members 105 The part around the outer surface of respective members 105 110 is vertically spaced apart.Bracket 150,160 can be fixedly secured to corresponding The cylindrical outer surface of component 75,105.Each bracket 150 of each connection component 145 extends to the same of respective tubular component 75 One end 75A, 75B, therefore, the outer circumferential bracket 150 of each connection component 145 is (for example, closer to the cross side of component 145 The bracket 150 of arrangement) than circumferential medial cradle 150 (for example, closer to bracket 150 of the transverse center arrangement of component 145) water Level land extends bigger distance and reaches respective end 75A, 75B, to compensate the curvature of the outer surface 110 of respective tubular component 105.

Referring now still to Fig. 5, each vertical rack 150 includes first end or upper end 151, second end or lower end 152, at both ends The back or vertebra portion 154 that extend between 151 and 152, at upper end 151 from vertebra portion 154 (and backwards to tubular element 105) The first protrusion for horizontally extending or protrude above portion 156 and at lower end 152 from vertebra portion 154 (and backwards to tubulose structure Part 105) the second protrusion or lower protrusion 158 that horizontally extend.The rear side vertebra portion 164 for being attached to tubular element 105 is in Spill, to match the curvature of outer surface 110.The horizontal bracket 160 vertically placed in the middle of each connection component 145 includes first End or outer end 161, second end or inner end 162, the back that extends between both ends 161 and 162 or vertebra portion 164 and outside Hold the outside bulge 166 horizontally extended at 161 from vertebra portion 164.In the present embodiment, inner end 162 is located at adjacent members 105 Between and do not include protrusion, in order to avoid the adjacent tubular element 105 or connecting plate 82 of interference.Generally circular recess portion 170 is by convex Portion 156,158,166 limits out, and wherein the front of the separate respective tubular component 105 in vertebra portion 154,164 is located at public vertical In plane.Circular recess 170 is dimensioned end 75A, 75B that respective tubular component 75 is slidingly received with shape, should End 75A, 75B are soldered to protrusion 156,158,166 and vertebra portion 154,164.Recess portion 170 with corresponding end 75A, 75B opposite inner surface is flat, to match flat end 75A, 75B and flat end plate 80 of respective tubular component 75.? In some embodiments, the connecting plate 82 between tubular element 75 and the central horizontal bracket 160 from the extension of adjacent tubular member 105 Near alignment and centrally located horizontal bracket 160, and it can be soldered to two vertical racks 150.

Following potential is provided using intermediate connecting component 145: by avoiding the complexity of saddle interconnecting piece floating to simplify The manufacture of cylinder 62 and coupling for floating drum 62 and pillar 64.As a result, floating drum 62 can be formed by cylindrical tubular member 75, it is described Cylindrical tubular member 75 has flat end 75A, 75B, before floating drum 62 is connected to pillar 64, the flat end 75A, 75B is closed and is sealed by flat end plate 80.Therefore, floating drum 62 can be connected between pillar 64 at them and be manufactured, be sealed simultaneously Test.

In the present embodiment, each bracket 150 is coplanar with one of reinforcer 134A, the 134B on deck 130, wherein lower end Deck 130 is arrived in 152 connections (for example, welding), to provide between connection component 145, deck 130, floating drum 62 and pillar 64 Structural continuity.Bracket 150,160 can for example be welded onto the flat of component 75,105 and deck 130 and can pass through Any method as known in the art is installed.In the example of fig. 5, bracket 150,160 be spaced apart, with allow bonding machine and Worker enters to execute all welding processes and inspection.Vertical rack 150, horizontal bracket 160 and reinforcer 134A, 134B are together It is configured to distractive load, structural continuity is provided and stress is avoided to concentrate.It is contemplated that with conventional saddle interconnecting piece phase Than manufacture and inspection are more easy and more cost effective.

In Fig. 1 into embodiment shown in Fig. 3, each tubular element 75 is independent so that: each floating drum 62 it is adjacent The cavity 78 of tubular element 75 is separated from each other and is isolated in structure, separates with tubular element 105 and is isolated and manages with other The separation of shape component 75 and isolation.However, in other embodiments, space 78 or its ballast tank can pass through pipe-line system (plumbing) other components 75 or pillar 64 are interconnected to.

Referring now to Fig. 6, a corner of another embodiment of the hull 260 for floating offshore structure is shown. Superstructure (for example, superstructure 55) is supported on above water surface by hull 260, and can replace shown in Fig. 1 The hull 60 of platform 50.In the present embodiment, hull 260 includes the adjustable horizontal floating drum 262 of multiple buoyancy, these horizontal floating drums 262 are connected to the lower end of the adjustable pillar 64 of multiple buoyancy.Although illustrating only a corner of hull 260, Ying Li in Fig. 6 Solution, hull 260 include multiple vertical supports 64 and multiple horizontal floating drums 262, these horizontal floating drums 262 are connected under pillar 64 Closed loop base is held and is formed, which is similar to previously described pedestal 65.Shown in each corner of hull 260 and Fig. 6 It is identical, therefore, a corner of hull 260 will be described according to the understanding of " other corners of hull 260 are also identical ".

Pillar 64 is as previously described.Other than the intersection between the end of floating drum 262 and floating drum 262 and pillar 64, Floating drum 262 is substantially the same with previously described floating drum 62.More specifically, each floating drum 262 is including lateral connection side by side, more The tubular member 275 of a straight lengthwise being horizontally oriented.In the present embodiment, two parallel tubular elements 275 pass through Horizontal connecting plate 82 as previously described connects side by side, to form floating drum 262.Floating drum 262 has in linear (that is, straight) Mandrel line or longitudinal axis 276 can be fixedly coupled to the first end 275A of the lower end of a pillar 64 and can be fixed Ground is connected to the second end 275B of the lower end of another pillar 64.Every one end 275A, 275B of each tubular element 275 have recessed Shape curve form or saddle, the concave curved surface shape or saddle are matched with the cylindrical outer surface 110 of respective tubular component 105 and are merged Partly it is bonded.Similar to previously described cylindrical tubular member 75, in the present embodiment, each tubular element 275 includes Cylindrical side wall 277, internal cavities 78 and the multiple annular reinforcers 79 spaced apart along the inner surface axial of wall 277.So And component 275 does not have end cap or end plate at end 275A, 275B.But as will be described in more detail, cavity 78 It is sealed at the cross part of the lower end of one of end 275A, 275B and respective strut 64.Tubular element 275 also includes multiple axis To adjacent ballast tank, these ballast tanks are limited by axially spaced bulkhead.In general, tubular element 275 can with above The identical mode of cylindrical tubular member 75 is formed (for example, being formed by lengthwise material, may being rolled-up and longitudinally being welded It connects, or is formed by multiple short circular sections of end-to-end combination).

Referring now still to Fig. 6, floating drum 262 includes the horizontal sides listrium 84 of two reinforcements, the two horizontal sides listriums 84 are as above Outer surface describedly along tubular element 275 is axially extending.Connecting plate 82 and margin plate 84 are that floating drum 262 provides structural integrity Property and damping to vertical motion is provided, therefore, connecting plate 82 and margin plate 84 can be described as horizontal heave plate.In this reality It applies in example, plate 82,84 is arranged in common horizontal plane and is vertically located at the centre of tubular element 275.

The axis 276 of tubular element 275 is located in same level plane.It is multiple as previously for described in floating drum 62 The vertical height of corresponding floating drum 262 can be reduced or minimized in being arranged side by side for tubular element 275, while increasing or maximizing its water Flat width.This geometry provides following potential: reduce floating drum 262 and relevant platform is experienced may be due to ocean current The transverse load that generates with wave, and the vertical resistance by increasing floating drum 262 and additional mass reduce platform 50 Heaving.As a result, compared with the floating drum that the heaving for managing similarly sized conventional hull may need, using described herein floating The embodiment of cylinder (such as floating drum 262) provides the potential of the performance requirement and relevant cost that reduce anchoring system.

Referring now still to Fig. 6, each floating drum 262 is connected to corresponding tubular element 64 by interconnecting piece 285 --- in each pipe One interconnecting piece 285 is set between shape component 275 and corresponding tubular element 105.Particularly, each tubular element 275 is determined Position is connected to the lower end of the tubular element 105 at one in neighbouring vertical tubular element 105 and by an interconnecting piece 285 105B.Each interconnecting piece 285 is saddle interconnecting piece, and wherein curved end 275A, 275B of tubular element 275 is partially around corresponding The outer surface 110 is arrived in the outer surface 110 of tubular element 105 and directly connection (for example, welding).In the present embodiment, it connects Portion 285 does not include any gusset or bracket extended between the component 275,105 coupled, however, in other embodiments, Such feature can be added.In order to ensure enough spaces accommodate each tubular element 275 and respective tubular component 105 Between interconnecting piece 285, the outer diameter of each tubular element 275 is less than the outer diameter of respective tubular component 105.Particularly, Mei Geguan The outer diameter of shape component 275 is preferably the 80% to 90% of the outer diameter of respective tubular component 105.

Referring now to Fig. 7, a corner of another embodiment of the hull 360 for floating offshore structure is shown. Superstructure (for example, superstructure 55) is supported on above water surface by hull 360, and can replace shown in Fig. 1 The hull 60 of platform 50.In the present embodiment, hull 360 includes the adjustable horizontal floating drum 362 of multiple buoyancy, these horizontal floating drums 362 are connected to the lower end of the adjustable pillar 364 of multiple buoyancy.Although illustrating only a corner of hull 360 in Fig. 7, answer Understand, hull 360 includes multiple vertical supports 364 and multiple horizontal floating drums 362, these horizontal floating drums 362 are connected to pillar 364 Lower end and form closed loop base, the pedestal be similar to previously described pedestal 65.Each corner and Fig. 7 of hull 360 Shown in it is identical, therefore, an angle of hull 360 will be described according to the understanding of " other corners of hull 360 are also identical " Portion.

Floating drum 362 extends from the lower end of pillar 364.Similar to floating drum 262, each floating drum 362 includes as previously mentioned The tubular element 275 of side-by-side horizontal arrangement, multiple straight lengthwise.However, in the present embodiment, three parallel tubular elements 275 are connected by horizontal connecting plate 82 --- as it was noted above, the cloth between every a pair of of adjacent tubular member 275 of floating drum 362 It is equipped with a plate 82.In addition, floating drum 362 further include two reinforcement horizontal sides listriums 84, the two horizontal sides listriums 84 along The lateral area of two outermost tubular elements 275 longitudinal (that is, axially) extends.In the present embodiment, plate 82,84 is arranged in In common horizontal plane, and vertically it is located at the centre of tubular element 275.Connecting plate 82 and margin plate 84 are floating drum 362 Structural intergrity is provided and the damping to the vertical motion of platform 50 is provided, therefore is constructed imaging level heave plate and equally sends out The effect of waving.

The axis 276 of tubular element 275 is located in same level plane.As previously for described in floating drum 62, tubulose Being arranged side by side for component 275 can be reduced or minimized the vertical height of floating drum 362 and increase or maximize it described horizontal flat Width in face.This construction makes floating drum 362 and hull 360 be not easily susceptible to the lateral force that may be generated due to ocean current and wave It influences.Equally, this construction increases the vertical resistance of floating drum 362, to be configured to reduce the heaving of platform 50. Therefore, it can permit using floating drum 362 and use the anchoring system smaller or more cost effective than used in conventional hull.

Referring now still to Fig. 7, the pillar 364 of hull 360 is substantially identical as previously described pillar 60.Particularly, pillar 364 Including multiple vertical cylinder shape tubular elements 105, these cylindrical tubular members 105 be coupled to each other as previously mentioned and by The external deck 130 of lower section seals, which is used as heave plate.However, in the present embodiment, pillar 364 includes nine A cylindrical tubular member 105, these cylindrical tubular members 105 are parallel to vertically-oriented central axial line or longitudinal axis 101 extend.Tubular element 105 is arranged to generally square construction, wherein three tubular elements 105 are arranged along every side, And a central tube member 105 is surrounded by other tubular elements 105.

As it was noted above, each floating drum 362 can be fixedly coupled to respective strut by multiple interconnecting pieces 285 364 --- a tubular element 105 is connected to respective tubular component 105 by each interconnecting piece 285.Particularly, each tubulose structure Part 275 is positioned adjacent to one in vertical tubular element 105, and is connected to the tubulose structure by an interconnecting piece 285 The lower end 105B of part 105.As previously mentioned, each interconnecting piece 285 is saddle interconnecting piece, the wherein curved end of tubular element 275 275A, 275B partially around respective tubular component 105 outer surface 110 and directly connection (for example, welding) arrive the outer surface 110.In the present embodiment, interconnecting piece 285 does not include any gusset extended between the component 275,105 coupled or branch Frame, however, in other embodiments, such feature can be added.

In Fig. 6 and embodiment shown in Fig. 7, the cavity 78 of the tubular element 275 in each floating drum 262,362 is in structure On be separated from each other and be isolated, separate and be isolated with the tubular element 105 of pillar 64, and the tubulose with other floating drums 262,362 The separation of component 275 and isolation.However, in other embodiments, cavity 78 or its ballast tank can be interconnected to by pipe-line system Other components 275 or pillar 64.

The embodiment of floating drum 62,262,362 disclosed herein includes axially spaced (these rings of annular reinforcer 79 Shape reinforcer 79 is arranged along the inner surface of the cylindrical side wall 77,277 of cylindrical tubular member 75,275), but without inside Longitudinal reinforcer.The round tubular construction of component 75,275 is together with the offer structural intergrity of inner annular reinforcer 79 and just Degree, and connecting plate 82 and margin plate 84 are used as external longitudinal reinforcer, the connecting plate 82 and margin plate 84 enhance component 75, 275 and floating drum 62,262,362 structural intergrity or rigidity, and reduce heaving.

While there has been shown and described that exemplary embodiment, but those of ordinary skill in the art can not depart from this paper's It modifies in the case where range or introduction to them.Embodiment described herein is merely exemplary, and not restrictive. System, equipment and process described herein there may be many modifications, combination and modification and these all fall in the disclosure In range.Therefore, protection scope is not limited to embodiment described herein, and is defined solely by the appended claims, and range is answered All equivalent schemes including claim theme.It include any specific method and step or operation in written description or attached drawing It not necessarily indicates the specific step or operation is that this method is necessary.In addition to those of clear stipulaties sequence particular step Or except operation (if having), the step of the method listed in specification or claim or operation can be with any feasible Sequence execute.In some embodiments, method and step or operation in two or more can execute parallel, rather than go here and there It executes capablely.The identifier of (a), (b), (c) or (1) of reference, (2), (3) etc. before operation in claim to a method It is not intended to regulation nor provides specific operation order, but for simplifying the subsequent reference to this operation.

Claims (20)

1. a kind of floating offshore structure, comprising:

Buoyancy hull, the buoyancy hull include the first pillar, the second pillar and are connected to first pillar and described the The floating drum of two pillars, wherein each pillar is vertically oriented, and the floating drum extends horizontally to institute from first pillar State the second pillar；

Wherein, each pillar has central axis, top and bottom；

Wherein, the floating drum includes the first tubular element and the second tubular element, and second tubular element is oriented and institute It is laterally adjacent to state the first tubular element, wherein each tubular element has central axis, is connected to the described of first pillar The first end of lower end and be connected to second pillar the lower end second end；

Wherein, the longitudinal axis of the longitudinal axis of first tubular element and second tubular element is arranged in public level In plane.

2. offshore structure according to claim 1, wherein the floating drum includes first tubulose positioned at the floating drum Connecting plate between component and second tubular element, wherein the connecting plate can be fixedly coupled to first pipe Shape component and second tubular element.

3. offshore structure according to claim 2, wherein the connecting plate is horizontally extended from first tubular element To second tubular element.

4. offshore structure according to claim 3, wherein central axis of the connecting plate relative to the tubular element The second end of the tubular element is axially extended to from the first end of the tubular element.

5. offshore structure according to claim 2, wherein first edge plate extends from first tubular element, and Second edge plate extends from second tubular element, wherein first tubular element, the connecting plate and second pipe Shape component is arranged between the first edge plate and the second edge plate.

6. offshore structure according to claim 5, wherein the first edge plate is relative to first tubular element Central axis axially extends to the second end of first tubular element from the first end of first tubular element；

Wherein, the second edge plate is relative to the central axis of second tubular element from the institute of second tubular element State the second end that first end axially extends to second tubular element.

7. offshore structure according to claim 6, wherein the connecting plate is horizontally extended from first tubular element To second tubular element；And

Wherein, the first edge plate is horizontally extended from first tubular element, and the second edge plate is from described Second tubular element horizontally extends.

8. offshore structure according to claim 7, wherein the first edge plate, the second edge plate and the company Fishplate bar is vertically placed in the middle relative to first tubular element and second tubular element.

9. offshore structure according to claim 1, further include be connected to first pillar the lower end first outside The second outside deck on portion deck and the lower end for being connected to second pillar；

Wherein, the periphery of the lower end of first pillar, and described second are extended beyond to first deck level Extend beyond to deck level the periphery of the lower end of second pillar.

10. offshore structure according to claim 9, wherein each pillar includes multiple vertically-oriented tubular elements, In, each tubular element of each pillar all has upper end, lower end and cylindrical outer surface；

Wherein, the lower end of each tubular element of first pillar is closed and is sealed on first outside deck, and Close and seal the lower end of each tubular element of second pillar in second deck.

11. offshore structure according to claim 1, wherein each pillar includes multiple vertically-oriented tubular elements, In, each tubular element of each pillar all has upper end, lower end and cylindrical outer surface；

Wherein, the first end of first tubular element of the floating drum is connected to described first by the first connection component The lower end of one of the tubular element of column；

Wherein, the first end of second tubular element of the floating drum is connected to described first by the second connection component The lower end of one of the tubular element of column；

Wherein, each connection component includes the multiple vertical branch arranged along the outer surface of the respective tubular component of the pillar Frame, wherein the multiple vertical rack of first connection component limits first tubular element for accommodating the floating drum The first end circular recess, and the multiple vertical rack of second connection component limits and accommodates the floating drum Second tubular element the first end circular recess.

12. offshore structure according to claim 1, wherein each tubular element of the floating drum has circular cross section Shape.

13. offshore structure according to claim 12, wherein each tubular element of the floating drum includes between multiple axial directions The inner annular reinforcer separated.

14. a kind of floating offshore structure, comprising:

Buoyancy hull, the buoyancy hull include the first pillar, the second pillar and extend to described the from first pillar The floating drum of two pillars；

Wherein, each pillar is vertically oriented and has central axis, top and bottom；

Wherein, the floating drum includes the first cylindrical tubular member and the second cylinder for being parallel to the first tubular element orientation Shape tubular element, wherein second cylindrical tubular member is oriented and the first cylindrical tubular member transverse direction phase It is adjacent, wherein the lower end that each tubular element is oriented horizontally and has central axis, is connected to first pillar First end and be connected to second pillar the lower end second end.

15. offshore structure according to claim 14, wherein the floating drum includes from first cylindrical tubular member Extend horizontally to the connecting plate of second cylindrical tubular member.

16. offshore structure according to claim 15, wherein the connecting plate is relative to the first cylindrical structure The central axis of part axially extends to first cylindrical from the first end of first cylindrical tubular member The second end of component.

17. offshore structure according to claim 15, wherein first edge plate is from the first cylindrical tubular member water Level land extends, and second edge plate is horizontally extended from second cylindrical tubular member.

18. offshore structure according to claim 17, wherein the first edge plate is relative to first cylindrical tube The central axis of shape component axially extends to first cylinder from the first end of first cylindrical tubular member The second end of tubular element；

Wherein, the second edge plate is cylindrical from described second relative to the central axis of second cylindrical tubular member The first end of tubular element axially extends to the second end of second cylindrical tubular member.

19. offshore structure according to claim 17, wherein the connecting plate, the first edge plate and described second Margin plate is arranged in common horizontal plane.

20. offshore structure according to claim 14, further include be connected to first pillar the lower end first The second outside deck on external deck and the lower end for being connected to second pillar；

Wherein, the periphery of the lower end of first pillar, and described second are extended beyond to first deck level Extend beyond to deck level the periphery of the lower end of second pillar.